In Lake Victoria of East Africa, more than $Y$ species of $X$ fish became extinct together. Identify $X$ and $Y$.

• A
  $X = \text{Nile Perch}, Y = 100$
• B
  $X = \text{Cichlid}, Y = 200$
• C
  $X = \text{Clarias gariepinus}, Y = 100$
• D
  $X = \text{Lamprey}, Y = 2000$